Kamicharo Formation - Kushiro coal field, eastern Hokkaido: Early/Lower Miocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Crepidula sp.
Lamarck 1799
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Gastropoda
- Naticidae
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Sinum sp.
Röding 1798
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Bivalvia
- Nuculanida
- Sareptidae
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Portlandia (Acilana) hayasakai
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Portlandia sp.
Mörch 1857
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Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia sp.
Möller 1842
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Bivalvia
- Nuculida
- Nuculidae
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? Nucula sp.
Lamarck 1799
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Bivalvia
- Cardiida
- Tellinidae
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"Tellina" sp.
Linnaeus 1758
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Macoma (Macoma) tokyoensis
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Bivalvia
- Cardiida
- Veneridae
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"Venerupis" sp.
Lamarck 1818
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Bivalvia
- Thraciida
- Periplomatidae
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Periploma sp.
Schumacher 1816
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Bivalvia
- Lucinida
- Thyasiridae
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Conchocele bisecta
(Conrad 1849)
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Bivalvia
- Lucinida
- Lucinidae
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Lucinoma annulata
(Reeve 1850)
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| recombined as Lucinoma annulatum | |||||||
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Bivalvia
- Carditida
- Carditidae
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Cyclocardia abesinaiensis
(Otuka 1940)
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 43.0° North, 144.1° East (view map) |
| Paleocoordinates: | 43.8° North, 142.2° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | local area |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Early/Lower Miocene | ||
| Age range of interval: | 23.03000 - 15.98000 m.y. ago |
Stratigraphy
| Formation: | Kamicharo | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Kamicharo Fm of the Atsunai Gp, which overlies the Nuibetsu Fm of the Ombetsu Gp (Late Oligocene) and is overlain by the Atsunai Fm of the Atsunai Gp (Middle Miocene). THICKNESS: ~50 m thick. AGE: Early Miocene. STRATIGRAPHIC POSITION: Composite checklist for formation. | |||||
Lithology and environment
| Primary lithology: | lithified siltstone |
| Secondary lithology: | lithified sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Siltstone, sandstone and shale. LITHIFICATION: Assumed to be lithifed on the basis of figured specimens and facies description (i.e. shale). | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Coastal marine, siliciclastic environment. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTOR: Presumably Y. Honda (c. 1984) and Suni and Yamaguchi (c. 1969). REPOSITORY: Uknown repository. | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropoda, bivalvia and scaphopoda. NOMENCLATURE: Authoritative publication, using moderately recent nomenclature, subgenus and species level designations. | |
Metadata
| Database number: | 70596 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-03-29 19:10:15 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2008-03-29 19:10:15 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 23698. | Y. Honda. 1989. Paleogene molluscan faunas from the Kushiro Coal Field, Eastern Hokkaido. Tohoku University, Science Report, 2nd series 60(1):1-137 [A. Hendy/A. Hendy] |